When the logbook memory gets full, the oldest dives are deleted to make space for new
ones.
NOTE: If you surface and then dive again within five minutes, Suunto D5 counts this as
one dive.
3.22. Oxygen calculations
During a dive, Suunto D5 calculates partial pressure of oxygen (pO
2
), central nervous system
toxicity (CNS%) and pulmonary oxygen toxicity, tracked by OTU (oxygen toxicity units). The
oxygen calculations are based on currently accepted exposure time limit tables and
principles.
By default in Air/Nitrox dive mode, CNS% and OTU values are not displayed until they reach
80% of their recommended limits. When either value reaches 80%, Suunto D5
notifies you
and the value stays in the view.
NOTE: You can customize views to always show CNS% and OTU. See 4.8. How to
customize dive modes with DM5. See also the Suunto Support for Q and A on DM5 at https://
www.suunto.com/Support/software-support/dm5/dm5-faq/
Suunto D5
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